Liquid gas storage tank

Abstract

The utility model provides a liquid gas storage tank, and belongs to the technical field of gas processing and utilization. The liquid gas storage tank comprises an inner tank, an outer tank, a cooling wound pipe and a central pipe, the inner tank is arranged in the outer tank to form a double-layer tank body, the influence of the external environment on the inner tank is reduced, meanwhile, the cooling winding pipe is spirally wound outside the inner tank and attached to the outer wall of the inner tank, the side wall of the inner tank is directly cooled through the cooling winding pipe, the influence of the external environment change on the pressure of the inner tank is reduced, and the service life of the inner tank is prolonged. In addition, the central pipe is arranged in the inner tank and arranged along the central axis of the inner tank, the central area of the inner tank is directly cooled through the central pipe, simultaneous cooling of the inner area and the outer area of the inner tank is achieved under the dual action of the cooling winding pipe and the central pipe, the cooling effect is better, and the cooling efficiency is higher. And the safety of gas storage is further improved.

Description

Technical Field

[0001] This utility model relates to the field of gas processing and utilization technology, specifically to a liquid gas storage tank. Background Art

[0002] To improve storage efficiency, industrial and domestic gases are usually stored in a high-pressure, low-temperature liquid state. Before use, they are typically stored in liquid gas storage tanks. Therefore, the structure of the liquid gas storage tanks directly determines the safety of gas use.

[0003] Currently, existing liquid gas storage tanks on the market, such as the liquid combustible gas storage tank disclosed in patent CN105378367A, are horizontal cylindrical tanks, including an inner tank of cryogenic steel and an outer tank of cryogenic steel. The inner tank is located inside the cavity of the outer tank, and the bottom of the outer tank is provided with feet to support the tank on a support structure. An outlet pipe passes through the outer tank and connects to the interior of the inner tank. That is, existing liquid gas storage tanks are typically double-layered structures, horizontally installed on a support structure, and use an outlet pipe for gas delivery. Furthermore, they are usually placed in the open environment. When the ambient temperature changes significantly, the pressure inside the tank also changes significantly. Therefore, the industry typically uses a vacuum between the inner and outer tanks to insulate against the external environment and reduce the impact of external environmental factors on the internal pressure. Although the above structure can meet the basic needs of liquid gas storage, the inner tank needs to be stably installed inside the outer tank, which means that there are still many connecting support structures between the inner and outer tanks. In order to ensure the structural strength of the connecting support structures, the connecting support structures are also made of cryogenic steel. Since cryogenic steel has good thermal conductivity, there is still a problem of thermal conduction between the inner and outer tanks, which means that the pressure in the inner tank will still be affected by the external ambient temperature. Summary of the Invention

[0004] To address the aforementioned problems in existing technologies, this invention aims to provide a liquid gas storage tank with a cooling coil installed between the inner and outer tanks, contacting the outer wall of the inner tank. The cooling coil cools the inner tank, reducing the impact of ambient temperature on the gas pressure within the inner tank. Additionally, a central tube extends axially through both ends of the inner tank, directly cooling the central region of the inner tank. This enhances the cooling effect, resulting in higher cooling efficiency, better maintenance of the inner tank environment, and improved storage safety.

[0005] The specific technical solution is as follows:

[0006] A liquid gas storage tank includes an inner tank and an outer tank, both of which are cylindrical. The inner tank is installed inside the outer tank, and the inner tank has an inlet and an outlet extending to the outside of the outer tank. The tank also includes a cooling coil and a central tube. The cooling coil is spirally arranged in the space between the inner and outer tanks, and is wound around the outside of the inner tank and tightly attached to its outer wall. The central tube is arranged along the central axis of the inner tank. Both ends of the central tube and the cooling coil extend to the outside of the outer tank, and pipe joints are installed at both ends of the central tube and the cooling coil extending to the outside of the outer tank.

[0007] The aforementioned liquid gas storage tank further includes an end support member, which is a conical annular structure. One end of the end support member is fixedly connected to the outer wall of the inner tank, and the other end is fixedly connected to the inner wall of the outer tank. The large-diameter end and the small-diameter end of the end support member abut against the inner wall of the outer tank and the outer wall of the inner tank, respectively.

[0008] The aforementioned liquid gas storage tank includes a plurality of connecting support members between an inner tank and an outer tank. The plurality of connecting support members are arranged at intervals along the axial direction of the inner tank. One end of each connecting support member is fixedly connected to the outer wall of the inner tank, and the other end is fixedly connected to the inner wall of the outer tank.

[0009] In the aforementioned liquid gas storage tank, each end support and connecting support is provided with several perforated holes.

[0010] In the aforementioned liquid gas storage tank, the connecting support includes an upper support and a lower support. When the inner tank is arranged horizontally, the upper support and the lower support are respectively located above and below the inner tank. Furthermore, both the upper support and the lower support include an outer arc-shaped piece, a fan-shaped plate, and an inner arc-shaped piece. The outer arc-shaped piece is attached to the inner wall of the outer tank and arranged circumferentially along the outer tank. The inner arc-shaped piece is attached to the outer wall of the inner tank and arranged circumferentially along the inner tank. The fan-shaped plate is located between the outer arc-shaped piece and the inner arc-shaped piece. In the axial direction of the inner tank, the width of the outer arc-shaped piece and the inner arc-shaped piece is greater than the thickness of the fan-shaped plate.

[0011] In the aforementioned liquid gas storage tank, the outer arc-shaped plates of the lower support are connected end-to-end in the axial direction of the inner tank to form an integral structure.

[0012] The aforementioned liquid gas storage tank further includes a base foot, which is located at both ends of the outer tank and on the same side of the outer tank. The base foot includes a support plate, a diagonal support, and a base plate. The support plate has an arc-shaped structure and wraps around the bottom of the outer tank. The diagonal support is installed below the support plate and its upper end is fixedly connected to the support plate. The base plate is arranged horizontally below the diagonal support and is fixedly connected to the diagonal support.

[0013] The aforementioned liquid gas storage tank further includes a pressure relief port, which is located at the bottom of the inner tank and extends to the outside of the outer tank, and a pressure relief valve is installed on the pressure relief port.

[0014] The aforementioned liquid gas storage tank further includes a temperature monitoring port and a pressure monitoring port. Both the temperature monitoring port and the pressure monitoring port include extension tubes. One end of the extension tube is connected to and communicates with the inner tank, and the other end of the extension tube extends out to the outside of the outer tank. The detection ends of the thermometer and the pressure gauge are respectively inserted into the extension tubes of the temperature monitoring port and the pressure monitoring port.

[0015] The aforementioned liquid gas storage tank, wherein the space between the inner tank and the outer tank is filled with insulating cotton.

[0016] The positive effects of the above technical solution are:

[0017] The aforementioned liquid gas storage tank, by incorporating a spirally arranged cooling coil within a double-layered tank comprising an inner and outer tank, with the cooling coil adhering to the outer wall of the inner tank, allows for active cooling of the inner tank. This enables the cooling coil to counteract the increased external temperature when heat is conducted to the inner tank due to rising external temperatures, thus preventing pressure buildup within the inner tank and improving gas storage safety. Furthermore, a central pipe running through both ends of the inner tank's central axis cools the central area of ​​the inner tank, addressing the issue of the cooling coil only cooling the sidewalls of the inner tank, which results in poor cooling efficiency. This further enhances the safety of gas storage. Attached Figure Description

[0018] Figure 1 This is a structural diagram of an embodiment of a liquid gas storage tank according to the present invention;

[0019] Figure 2 This is a cross-sectional view of an embodiment of a liquid gas storage tank according to the present invention;

[0020] Figure 3 for Figure 2 A cross-sectional view along line AA.

[0021] In the attached diagram: 1. Inner tank; 11. Pressure relief port; 12. Temperature monitoring port; 13. Pressure monitoring port; 121. Extension pipe; 2. Outer tank; 21. Insulation cotton; 3. Inlet; 4. Outlet; 5. Cooling winding pipe; 51. Pipe joint; 6. Central pipe; 7. End support; 71. Hollow hole; 8. Connecting support; 81. Upper support; 82. Lower support; 811. Outer arc-shaped piece; 812. Fan-shaped plate; 813. Inner arc-shaped piece; 9. Foot; 91. Support plate; 82. Diagonal support; 93. Base plate. DETAILED DESCRIPTION

[0022] To make the technical means, creative features, objectives, and effects of this utility model easier to understand, the following embodiments are provided in conjunction with the appendix. Figure 1 To the attached Figure 3 The technical solution provided by this utility model is described in detail, but the following content is not intended to limit this utility model.

[0023] Figure 1 This is a structural diagram of an embodiment of a liquid gas storage tank according to the present invention; Figure 2 This is a cross-sectional view of an embodiment of a liquid gas storage tank according to this utility model. Figure 1 and Figure 2 As shown, the liquid gas storage tank provided in this embodiment includes an inner tank 1 and an outer tank 2. Both the inner tank 1 and the outer tank 2 are arranged in a cylindrical shape, with the inner tank 1 installed inside the outer tank 2, forming a double-layered tank body to improve the isolation capability of the inner tank 1 from the outside environment. Preferably, the gap between the inner tank 1 and the outer tank 2 is evacuated, further improving the isolation performance of the inner tank 1 from the outside environment and reducing the influence of the external environment. Furthermore, an inlet 3 and an outlet 4 extending to the outside of the outer tank 2 are connected to the inner tank 1, allowing the liquid gas to enter and exit, meeting storage and usage requirements.

[0024] Specifically, a cooling coil 5 is installed in the gap between the inner tank 1 and the outer tank 2. The cooling coil 5 is arranged in a spiral shape, and the spiral direction of the cooling coil 5 is consistent with the axial direction of the inner tank 1, thus achieving coverage along the length of the inner tank 1 and maximizing cooling. Furthermore, the cooling coil 5 is wound around the outside of the inner tank 1 and is in close contact with the outer wall of the inner tank 1. This means that the cooling coil 5 cools the inner tank 1 by directly contacting the outer wall of the inner tank 1, unaffected by the vacuum environment between the outer tank 2 and the inner tank 1. In addition, the central tube 6 is arranged along the central axis of the inner tank 1, directly cooling the central area of ​​the inner tank 1. That is, the outer area of ​​the inner tank 1 is cooled by the cooling coil 5, while the central area of ​​the inner tank 1 is cooled by the central tube 6, achieving multi-directional cooling, improving the cooling effect and efficiency, meeting the needs of rapid temperature adjustment, offsetting the impact of external ambient temperature changes on the pressure in the inner tank 1, and improving gas storage safety. Meanwhile, both ends of the central tube 6 and the cooling coil 5 are extended to the outside of the outer tank 2, and pipe joints 51 are installed on both ends of the central tube 6 and the cooling coil 5 extending to the outside of the outer tank 2. The connection between the central tube 6 and the cooling coil 5 and the external refrigeration equipment is realized through the pipe joints 51, making the connection more convenient.

[0025] More specifically, an end support 7 is provided in the gap between the inner tank 1 and the outer tank 2, and both ends of the inner tank 1 are provided with end supports 7, realizing the supporting connection between the ends of the inner tank 1 and the outer tank 2, and improving the stability of the inner tank 1 installed in the outer tank 2. At this time, the end support 7 is a ring structure arranged in a conical shape. During installation, one end of the end support 7 is fixedly connected to the outer wall of the inner tank 1, and the other end of the end support 7 is fixedly connected to the inner wall of the outer tank 2, so that the end support 7 can restrict the ends of the inner tank 1 and the outer tank 2, thereby improving the installation stability of the inner tank 1 in the outer tank 2. Furthermore, the large-diameter end and the small-diameter end of the end support 7 abut against the inner wall of the outer tank 2 and the outer wall of the inner tank 1, respectively. This allows the end support 7 to form an approximately triangular support after being arranged in the gap between the outer tank 2 and the inner tank 1, and after forming a cross section along the plane passing through the axis of the inner tank 1. This results in a better support effect and also adapts to the arrangement of the larger outer tank 2 and the smaller inner tank 1 at their ends, making more reasonable use of space.

[0026] More specifically, a number of connecting support members 8 are provided between the inner tank 1 and the outer tank 2. These connecting support members 8 are arranged at intervals along the axial direction of the inner tank 1, ensuring that each point along the length of the inner tank 1 is supported by a corresponding connecting support member 8. Furthermore, one end of each connecting support member 8 is fixedly connected to the outer wall of the inner tank 1, and the other end of each connecting support member 8 is fixedly connected to the inner wall of the outer tank 2. This provides stable support to the side wall areas of both the inner tank 1 and the outer tank 2 through the connecting support members 8, further improving the stability of the inner tank 1 installed inside the outer tank 2.

[0027] Figure 3 for Figure 2 A sectional view along line AA. (See example) Figure 2 and Figure 3 As shown, each end support 7 and connecting support 8 has several hollow holes 71. The hollow holes 71 reduce the weight of the end support 7 and connecting support 8, and also reduce their own heat conduction capacity, further reducing the influence of the external ambient temperature on the environment in the inner tank 1.

[0028] More specifically, the connecting support 8 for supporting the inner tank 1 and the outer tank 2 includes an upper support 81 and a lower support 82. When the inner tank 1 is arranged horizontally, the upper support 81 and the lower support 82 are respectively positioned above and below the inner tank 1. Since the liquid gas is at the bottom of the inner tank 1 under gravity after the tank is placed horizontally, meaning the weight is concentrated at the bottom of the inner tank 1, separating the upper support 81 and the lower support 82 allows for a reasonable structural arrangement, providing conditions for reinforcing the subsequent structure with a larger load-bearing capacity. In addition, both the upper support member 81 and the lower support member 82 include an outer arc-shaped piece 811, a fan-shaped plate 812, and an inner arc-shaped piece 813. During installation, the outer arc-shaped piece 811 is attached to the inner wall of the outer tank 2 and arranged along the circumference of the outer tank 2, and the inner arc-shaped piece 813 is attached to the outer wall of the inner tank 1 and arranged along the circumference of the inner tank 1. At the same time, the fan-shaped plate 812 is placed between the outer arc-shaped piece 811 and the inner arc-shaped piece 813. The outer arc-shaped piece 811 and the inner arc-shaped piece 813 increase the structural strength of the fan-shaped plate 812 at the position where it connects the outer tank 2 and the inner tank 1, ensuring the stability and reliability of the structure after connection. Furthermore, in the axial direction of the inner tank 1, the width of the outer arc-shaped piece 811 and the inner arc-shaped piece 813 is greater than the thickness of the sector plate 812, so that the two sides of the outer arc-shaped piece 811 and the inner arc-shaped piece 813 can extend to the two sides of the sector plate 812, expanding the connection area between the sector plate 812 and the outer tank 2 and the inner tank 1, ensuring the support effect, improving the stability of the inner tank 1, and at the same time, increasing the structural strength of the side walls of the inner tank 1 and the outer tank 2.

[0029] More specifically, the outer arc-shaped pieces 811 of several lower support members 82 are connected end-to-end in the axial direction of the inner tank 1 to form an integral structure. Preferably, the outer arc-shaped pieces 811 of the lower support members 82 are obtained by bending a whole plate, so that several lower support members 82 can form an integral structure, which has a stronger load-bearing capacity as the main load-bearing structure of the inner tank 1.

[0030] More specifically, the bottom of the outer tank 2 is also provided with feet 9. These feet 9 are located at both ends of the outer tank 2 and on the same side, providing stable support for the horizontally placed tank. Each foot 9 includes a support plate 91, a diagonal support 82, and a base plate 93. The support plate 91 has an arc-shaped structure and wraps around the bottom of the outer tank 2, supporting the outer tank 2 and increasing the structural strength of the connection. Simultaneously, the diagonal support 82 is installed below the support plate 91 and its upper end is fixedly connected to the support plate 91. The horizontally arranged base plate 93 is located below the diagonal support 82 and is fixedly connected to it. The base plate 93 expands the contact area between the bottom of the diagonal support 82 and the ground. Furthermore, the diagonal support 82 improves stability during support, ensuring greater stability when the tank is placed horizontally on the ground.

[0031] More specifically, the storage tank also includes a pressure relief port 11. In this case, the pressure relief port 11 is set at the bottom of the inner tank 1 and extends to the outside of the outer tank 2. Furthermore, a pressure relief valve is installed on the pressure relief port 11 so that when the pressure in the inner tank 1 unexpectedly rises, the pressure can be relieved through the pressure relief valve on the pressure relief port 11 to ensure the safety of the storage tank.

[0032] More specifically, the storage tank is also equipped with a temperature monitoring port 12 and a pressure monitoring port 13. Both the temperature monitoring port 12 and the pressure monitoring port 13 include extension tubes 121. During installation, one end of each extension tube 121 is connected to the inner tank 1 and communicates with the inner tank 1. The other end of each extension tube 121 extends to the outside of the outer tank 2. That is, the inner tank 1 is directly connected to the outside through the extension tubes 121. Furthermore, the detection ends of the thermometer and the pressure gauge are respectively inserted into the extension tubes 121 of the temperature monitoring port 12 and the pressure monitoring port 13. That is, the monitoring of parameters in the inner tank 1 is directly realized by the thermometer and the pressure gauge through the extension tubes 121, without being affected by the spatial environment between the inner tank 1 and the outer tank 2, thus ensuring the accuracy of the monitoring results.

[0033] More specifically, the space between the inner tank 1 and the outer tank 2 is filled with insulation cotton 21. The insulation cotton 21 further enhances the inner tank 1 and the outer tank 2, reduces the influence of the external environment on the inner tank 1, and improves the safety of gas storage.

[0034] The liquid gas storage tank provided in this embodiment includes an inner tank 1, an outer tank 2, a cooling coil 5, and a central tube 6. By placing the inner tank 1 inside the outer tank 2 to form a double-layer tank, the influence of the external environment on the inner tank 1 is reduced. At the same time, the cooling coil 5 is spirally wound around the outside of the inner tank 1 and fits against the outer wall of the inner tank 1. The cooling coil 5 directly cools the side wall of the inner tank 1, reducing the impact of changes in the external environment on the pressure of the inner tank 1 and improving the safety of gas storage. In addition, the central tube 6 is placed in the inner tank 1 and arranged along the central axis of the inner tank 1. The central tube 6 directly cools the central area of ​​the inner tank 1. Under the dual action of the cooling coil 5 and the central tube 6, the inner and outer areas of the inner tank 1 are cooled simultaneously, resulting in better cooling effect and higher cooling efficiency, further improving the safety of gas storage.

[0035] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A liquid gas storage tank, comprising an inner tank and an outer tank, both the inner tank and the outer tank being arranged in a cylindrical shape, the inner tank being installed inside the outer tank, and the inner tank having an inlet and an outlet extending to the outside of the outer tank, characterized in that, It also includes a cooling coil and a central tube. The cooling coil is arranged in a spiral shape in the space between the inner tank and the outer tank. The cooling coil is wound around the outside of the inner tank and is in close contact with the outer wall of the inner tank. The central tube is arranged along the central axis of the inner tank. Both ends of the central tube and the cooling coil extend to the outside of the outer tank, and pipe joints are installed on both ends of the central tube and the cooling coil that extend to the outside of the outer tank.

2. The liquid gas storage tank according to claim 1, characterized in that, It also includes an end support member, which is a ring structure arranged in a conical shape. One end of the end support member is fixedly connected to the outer wall of the inner tank, and the other end is fixedly connected to the inner wall of the outer tank. Furthermore, the large-diameter end and the small-diameter end of the end support member abut against the inner wall of the outer tank and the outer wall of the inner tank, respectively.

3. The liquid gas storage tank according to claim 2, characterized in that, A plurality of connecting supports are provided between the inner tank and the outer tank. The plurality of connecting supports are arranged at intervals along the axial direction of the inner tank. One end of each connecting support is fixedly connected to the outer wall of the inner tank, and the other end is fixedly connected to the inner wall of the outer tank.

4. The liquid gas storage tank according to claim 3, characterized in that, Each of the end support members and the connecting support members has several hollow holes.

5. The liquid gas storage tank according to claim 3 or 4, characterized in that, The connecting support includes an upper support and a lower support. When the inner tank is arranged horizontally, the upper support and the lower support are respectively positioned above and below the inner tank. Both the upper support and the lower support include an outer arc-shaped piece, a fan-shaped plate, and an inner arc-shaped piece. The outer arc-shaped piece is attached to the inner wall of the outer tank and arranged circumferentially. The inner arc-shaped piece is attached to the outer wall of the inner tank and arranged circumferentially. The fan-shaped plate is positioned between the outer arc-shaped piece and the inner arc-shaped piece. In the axial direction of the inner tank, the width of the outer arc-shaped piece and the inner arc-shaped piece is greater than the thickness of the fan-shaped plate.

6. The liquid gas storage tank according to claim 5, characterized in that, The outer arc-shaped pieces of the lower support are connected end-to-end in the axial direction of the inner tank to form an integral structure.

7. The liquid gas storage tank according to claim 1, characterized in that, It also includes feet, which are provided at both ends of the outer can and located on the same side of the outer can. The feet include a support plate, a diagonal support, and a base plate. The support plate has an arc-shaped structure and wraps around the bottom of the outer can. The diagonal support is installed below the support plate and its upper end is fixedly connected to the support plate. The base plate is arranged horizontally below the diagonal support and is fixedly connected to the diagonal support.

8. The liquid gas storage tank according to claim 1, characterized in that, It also includes a pressure relief port, which is located at the bottom of the inner tank and extends to the outside of the outer tank, and a pressure relief valve is installed on the pressure relief port.

9. The liquid gas storage tank according to claim 1, characterized in that, It also includes a temperature monitoring port and a pressure monitoring port, both of which include an extension tube. One end of the extension tube is connected to and communicates with the inner tank, and the other end of the extension tube extends out to the outside of the outer tank. The detection ends of the thermometer and the pressure gauge extend into the extension tubes of the temperature monitoring port and the pressure monitoring port, respectively.

10. The liquid gas storage tank according to claim 1, characterized in that, The space between the inner tank and the outer tank is filled with insulating cotton.

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